Warp stop-motion for looms.



PATENTED DEC. 5, 1905.

H. WYMAN.

WARP STOP MOTION FOR LOOMS.

APPLICATION FILED D110. 2, 190a.

llllll PATENTED DEC. 5, 1905.

H. WYMAN.

WARP STOP MOTION FOR. LOOMS.

APPLICATION FILED DEC. 2, 1903.

3 SHEBTS-SHBET 3.

UNITED STATES PATENT OFFICE.

HORACE WYMAN, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO CROMPTON &KNOWLES LOOM WORKS, OF WORCESTER, MASSA- CHUSETTS, A CORPORATION OFMASSACHUSETTS.

WARP STOP-MOTION FOR LOOIVIS- Specification of Letters Patent.

Patented Dec. 5, 190 5.

Application filed December 2', 1903. Serial No. 183,434.

To all whom it may concern.-

Be it known that I, HORACE VVYMAN, acitizen of the United States,residing at Worcester, in the county of Worcester and State ofMassachusetts, have invented certain new and useful Improvements in WarpStop-Motions for Looms, ofwhich the following is a specification.

My invention relates to warp stop-motions for looms, and particularly toan electrical Warp stop-motion in which two or more sets of drop bars orwires hung on the warpthreads intermediate the back roll and theharnesses are used. The dropping of one of the drop-bars on the breakingof the Warpthread on which it is hung will establish an electric circuitand through coacting mechanism will stop the loom in the ordinary andwell-known way.

The object of my invention is to improve upon the construction of warpstop-motions of the class above referred to, and more particularly toprovide in an electric warp stopmotion two sets of drop-bars with a freespace between them and each drop-bar having a contacting projectionthereon and an inclosed slot in its upper part and an openend slot inits lower part and two parallel terminals or circuit-bars of one pole,one terminal for each set of drop-bars, and extending through theinclosed slot therein, and a single terminal or circuit-bar of theopposite pole intermediate the two sets of drop-bars and substantiallyin line with the pair of parallel terminals, with which single terminala projection on any one of the drop-bars will contact to establish thecircuit between the terminal of one pole, on which the drop-bar isretained, and the terminal of the other pole intermediate the pair ofterminals. The pair of parallel terminals and the intermediate terminalmay be stationary or fixedly supported, but are preferably movablysupported to be raised and give access to the broken warp-thread. Theterminals may have a yielding connection with the main wires of thecircuit, which are fixed on the loom-frame, so that the raising andlowering of the terminals will not break the circuit, or the terminals'may have a connection by contact, which will be broken when theterminals are raised.

My invention consists in certain novel features of construction of myimprovements, as will be hereinafter described.

Referring to the drawings, Figure 1 is a plan view of a warp stop-motionembodying my improvements. Fig. 2 is a section on line 2 2, Fig. 1,looking in the direction of arrow shows the movable frame carrying theterminals in its raised position. Fig. 5 is a section through theterminals taken at a point indicated by line 5 5, Fig. 1, looking in thedirection of arrow a, same figure, showing a bridge or support for theterminals. Fig. 6 corresponds to Fig. 5, but shows a modifiedconstruction of the bridge. Fig. 7 shows another modified constructionof the bridge. Fig. 8 is a plan view of a detached portion of the upperpart of Fig. 1, showing a modified construction; and Fig. 9 is an endview of the parts shown in Fig. 8 looking in the direction of arrow 0,same figure.

In the accompanying drawings, 1 represents the end frames or plates ofthe warp stopmotion, adapted to be rigidly secured to the loom-frame.

2 and 3 are the transverse warp-supporting rods mounted in suitablebearings 1 on the frame 1. The warp-threads 4 are in this instancedivided into two planes, which cross each other midway between the rods2 and 3.

5 and 6 are transverse bars which extend between and are secured to theend plates 1.

7 represents four transverse rods secured at their ends to the endplates 1. Said rods serve to guide the lower ends of the drop-bars 8.The drop-bars 8 are made of thin sheet metal, as is customary, and inthis instance are arranged in two parallel series. Each drop-bar 8 hasin this instance an open-end slot 8 in its lower part and an inclosedelongated slot 8" in its upper part and a projection or extension 8 onone edge at its upper end, which forms a contacting surface.

Two parallel terminals, in this instance shown as rods 9 and 10 ofcircular or curved shape in cross-section, one for each set of dropbars8, extend transversely through the inclosed slots 8 in the drop-bars 8.Said terminals 9 and 10 are both of one pole, in this instance negative.The terminals 9 and 10 are in this instance removably supported at oneend by extending into holes in a non-conducting block 11,, as indicatedby broken lines in Fig. 1. The block 11 is secured on a frame or bracket12, which is preferably movable and in this instance is pivoted at oneend on a pin 13, mounted in an extension 1 on the frame 1. A lug or ear1 on the frame 1 in this instance limits the downward motion of thebracket 12. i The other ends of the terminals 9 and 10 are in thisinstance removably supported in recesses on a metal bar 14, which isinsulated from the supporting frame or bracket 15, corresponding to theframe or bracket 12 and pivotally supported on apin 16.

A plate or bar 17 extends over the ends of the terminals 9 and 10 tohold .them in place and is secured to the bar 14 by a screw 18, as shownin Figs. 1 and 3. A wire 1 1 of the negative pole leads from the bar 1Ato connect the terminals 9 and 10 with a magnet. (Not shown.)

Intermediate the terminals 9 and 10 is a terminal 19 of the oppositepole, in this instance positive. The terminal 19 in this instanceconsists of a flat metal bar, which is support-' ed on a bar 20, ofnon-conducting material, having edges which project beyond the edges ofthe terminal and are adapted to engage the inner edges of the drop-bars8 and prevent their contacting with said terminal 19 except when adrop-bar is in its lowered position, when the extension 8 thereon willcontact with the terminal 19, as shown in Fig. 2. The bar 20 and theterminal 19 are detachably supported at one end in the non-conductingblock 11 by a screw 21 (see Fig. 1) and at their other end in anon-conducting block 23 on the bracket or frame 15. A wire 24 leads fromthe intermediate terminal 19,which wire in this instance is of thepositive pole and leads to a magnet. (Not shown.) The intermediateterminal 19 is so placed relative to the terminals 9 and 10 and thedrop-bars 8 that on the breaking of a warp-thread 4, on which a drop-baris supported, the contacting projection 8' on the drop-bar will engagewith the terminal 19, as shown at the left in Fig. 2, to establish orcomplete the electric circuit and through coacting mechanism (not shown)stop the loom.

In connection with the intermediate terminal 19 I preferably useadjustable plates 25, one at each end of the terminal 19 and adjustablyconnected therewith to have a motion toward and away from each other, inthis instance by screws 26, extending through slots 25 in said plates25. The plates 25 are preferably of non-conducting material and are forthe purpose of holding in position the upper ends of the drop-bars 8 onthe terminals 9 and 10 between said plates 25.

In connection with the terminals I preferably use a bridge 27, ofnon-conducting material, to hold the terminals 9 and 10 in properrelative position. The bridge 27 may be made in the form shown in Fig.5, with recesses to hold the terminals 9 and 10, or in the form shown inFig. 6, simply to support the terminals intermediate their ends, or, asshown in Fig. 7, to hold the terminals apart intermediate their ends.The bridge 27 is made of non-conducting material and is secured in thisinstance to the non-conducting bar 20 of the intermediate terminal 19 bya screw 28.

The wires 14: and 24 form a yielding or flexible connection between theterminals 9,

'10, and 19 and the main wires of the circuit,

so that the frame supporting the terminals can be raised withoutdisarranging the connections or interfering with the circuit.

In Figs. 8 and 9 is shown a modified construction of the connectionbetween the terminals and the wires of the circuit. On the outer side ofthe frame 1 is secured by screws 29 or otherwise a non-conducting block30. To one side of the block 30 is secured a conductor 31, preferably ametal plate, to which -is attached the end of the positive wire 32.

The upper end of the plate 31 is in a position to be engaged by a pin 33(which is attached by screw 3 1 to the end of the terminal 19) when themovable terminal 19 is in its lowered position, as shown. To the otherside of the block 30 is secured a conductor-plate 35, to which isattached the end of the negative wire 36. The upper end of the plate 35is in a position to be engaged by the extended end of the terminal 9when said terminal is in its lowered position, as shown. The raising ofthe terminals with their supportingframes will disengage them from theplates 31 and 35, and thus break the circuit.

I have shown in the drawings the terminals 9 and 10 of the negative poleand the intermediate terminall9 of the positive pole; but it will beunderstood that the terminals 9 and 10 may be of the positive pole andthe intermediate terminal 19 of the negative pole, if preferred.

I have shown in the drawings and herein described the terminalssupported on movable supports. If preferred, the terminals may besupported in a fixed position on the frame.

The terminals upon which the drop devices are placed besides acting asterminals of the electric circuit also serve as guides to retain thedrop devices in position, and said terminals will serve as well inmechanical warpstop motions to guide and retain the drop devices placedon the warps.

The terminals 9 and 10 being of circular shape in cross-section insteadof fiat or noncircular, as is customary, reduce the frictionalcontact-surface between said terminals and the drop-bars 8, thusadmitting of freer action of the drop-bars. The terminals 9 and 10 alsoact as guides for the drop-bars to direct their movement in a verticaldirection at their upper ends.

It will be understood that my improvements may be combined with anywell-known form of electric warp stop-motion and the details ofconstruction may be varied, if desired.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is y 1. In a warp stop-motion, the combinationwith two warp-supporting rods, and two sets of drop-bars, each barhaving acontacting projection on its upper end, and an opening in itsupper part, of a pair of parallel terminals of one pole, extending abovethewarp-supporting rods, and through the openings in the dropbars, and aterminal of the opposite pole between the pair of terminals, and adaptedto be engaged by the contacting projection on a drop-be r, on thedropping of said bar, to complete the electric circuit,su bstantially asshown and described.

2. In a warp stop-motion, the combination with two sets of drop-barswith a space between them, and provided with openings through theirupper part, anda contacting projection thereon at their upper ends, oftwo parallel terminals of one pole, extending through the openings insaid drop-bars, an intermediate terminal of the opposite pole betweensaid pair of terminals, and a non-conducting surface below saidintermediate terminal, and between said drop-bars, substantially asshown and described.

- 3. In a warp stop-motion, the combination with two sets of drop-barseach bar having a projection or extension thereon, and an opening in itsupper part, and two parallel terminals of one pole extending throughsaid openings, of a terminal of the opposite pole, intermediate saiddrop-bar s, and a non-conducting surface below said intermediateterminal, to prevent the engaging of the edge of the dropbars with saidintermediate terminal, except with the projection on the drop-bars,substan tially as shown and described.

4. In a warp stop-motion, the combination with two parallel terminalsofone pole, having a space between them, of an intermediate terminal ofanother pole, and a non-conducting surface between the intermediateterminal, and the parallel terminals, substantially as shown anddescribed.

5. In a warp stop-motion, the combination with two sets of drop-bars,each set contacting with a terminal of one pole, and also with aterminal of the opposite pole, intermediate the two sets of drop-bars,on the breaking of a warp-thread, of a pair of parallel terminals of onepole, and an intermediate terminal of the opposite pole, and anon-conducting surface between the parallel terminals and saidintermediate terminal, substantially as shown and described.

6. In a warp stop-motion, the combination with two parallel terminals ofone pole, having a space between them, and an intermediate terminal ofanother pole arranged in said described.

7. In a warp stop-motion, the combination with two parallel terminals,and an intermediate terminal, of a bridge or support for the twoparallel terminals, secured to the intermediateterminal support,substantially as shown and described.

8. In a warp stop-motion, the combination with the terminals carried onmovable supports, of fixed electrical conductors in contact with saidmovable terminals, in their lowered position, to close the circuit, andout of contact in their raised position, to break the circuit,substantially as shownand described.

9. In a warp stop-motion, the combination with the terminals, and hingedor pivoted supports for said terminals, of a flexible or yieldingconnection to said movable terminals, to permit of said terminals beingraised without disarranging the connections of the electric circuit,substantially as shown and described.

10. In a warp stop-motion, the combination with the terminals of anelectric circuit placed above the warps, drop devices adapted to besupported on the warp-threads, and to contact with the two terminals ofthe circuit, when in a lowered position, by the breakage of awarpthread', of movable supports for said terminals whereby saidterminals, may be raised when a warp-thread is broken, to give access tosaid broken thread, substantially as shown and described.

11. In a warp stop-motion for looms provided with warp-supports, andhaving two series of drop devices supported on the lower planes of thewarps, each drop device provided with the slotted opening above thewarps, two terminals of an electric circuit passing through said slottedopenings, a terminal of another pole intermediate said two terminals, anindicating projection on each drop device, above the intermediateterminal, to contact with said intermediate terminal, and establish anelectric circuit when a drop falls, substantially as shown anddescribed.

12. In a warp stop-motion for looms provided with warp-supporting rods,and having two series of drop devices supported on the lower planes ofthe warps, each drop device provided with a slotted opening above thewarps, two terminals of an electric circuit passing through said slottedopenings, a ter minal of another pole intermediate said two terminals,said terminals movably supported above the warps, an indicatingprojection on each drop device, above the intermediate terminal, tocontact with said intermediate terminal, and establish an electriccircuit when a drop falls, substantially as shown and described.

13. In a warp stop-motion for aloom, the

combination with two sets of drop-bars, each drop-bar having an openingin its upper part and a contacting projection at its upper end, and aterminal of an electric circuit of circular shape in cross-section,extending through the openings in each set of drop-bars, of a terminalof the opposite pole extending between the two sets of drop-bars attheir upper ends, and adapted to be engaged by the contacting projectionat the upper end of each drop -bar, substantially as shown anddescribed.

14. In a warp stop-motion for looms, the combination with the terminalsof two opposite poles of an open electric circuit, and dropbars to closethe circuit when any of said bars are in contact with both terminals,and two warp-supporting rods below said terminals, or a movable Iramefor supporting said terminals, which move with said frame, substantiallyas shown and described.

15. In a warp stop-motion for looms, the combination with warpsupporting .rods adapted to divide the warps into two planes, and twoseries of drop-bars adapted to be supported on the lower planes of thewarps, and provided with a slotted opening above the warps, of twoterminals of an electric circuit passing through said openings, and aterminal of an opposite pole for each set of dropbars outside thereof,and adapted to be engaged by said drop bars, substantially as shown anddescribed.

16. In a warp stop-motion for looms, two supporting lease-rods, adaptedto divide the warps into upper and lower planes, drop-bars adapted to besupported on the lower planes of the warps, and having a contactingprojection on their upper ends, and a slot in their upper parts, andcircular terminals of an electric circuit extending through said slots,and terminals of the opposite poles above said lease-rods, to contactwith the drop-bars, substantially as shown and described.

17. In av warp stop-motion for looms, the combination with twolease-rods, adapted to extend transversely through the warp-threads andto divide them into two planes, upper and lower, of terminals of anelectric circuit extending above said lease-rods, and drop-bars having acontacting projection at their upper ends, and an opening in their upperpart to receive the terminals of one pole, said dropbars adapted to besupported on-one of the planes of the warp, substantially as shown anddescribed.

HORACE WYMAN. Witnesses:

J. (J. DEWEY, M. HAAs.

